Home
Class 11
PHYSICS
Statement I: The driver of a moving car ...

Statement I: The driver of a moving car sees a wall in front of him. To avoid collision, he should apply brakes rather than taking a turn away from the wall.
Statement II: Frictional force is needed to stop the car or taking a turn on a horizontal road.

A

Statement I is true, statement II is true, Statement II is the correct explanation for statement I.

B

Statemet I is true, Statement II is true , Statement II is NOT the correct explanation for Statement I

C

Statement I is True, Statement II is False.

D

Statement I is False, Statement II is true

Text Solution

Verified by Experts

The correct Answer is:
B
Force needed when breaks are applied
`f_(1)=ma=(mv^2)/(d)`
(v: initial speed, d: distance from wall)
When turn is taken
`F_(2)=ma=(mv^2)/(d)`
Hence breaks must be applied.
Promotional Banner

Topper's Solved these Questions

  • NEWTON'S LAWS OF MOTION 1

    CENGAGE PHYSICS|Exercise Linked Comperhension|46 Videos

  • NEWTON'S LAWS OF MOTION 1

    CENGAGE PHYSICS|Exercise Integer|5 Videos

  • NEWTON'S LAWS OF MOTION 1

    CENGAGE PHYSICS|Exercise Multiple Correct|11 Videos

  • MISCELLANEOUS VOLUME 2

    CENGAGE PHYSICS|Exercise INTEGER_TYPE|10 Videos

  • NEWTON'S LAWS OF MOTION 2

    CENGAGE PHYSICS|Exercise Integer type|1 Videos

Similar Questions

Explore conceptually related problems

The driver of a car travelling at speed v suddenly sees a wall at a distance r directly infront of him. To avoid collision, should he apply the brakes or turn the car sharply away from the wall ? Give reason.

The driver of a car-travelling at speed V suddenly sees a wall at a distance r directly infront of him. To avoid collision. He should :

The driver of a car travelling at velocity v suddenly see a broad wall in front of him at a distance d. He should

A car moving on a horizontal road may be thrown out of the road in taking a turn.

The dirver of a car travelling at a velcituy (v) suddenly sees a broad wall in front of mim at a distance r . Is it better to brake or to turn sharply ?

A car driver going at speed v suddenly finds a wide wall at a distance r . Should he apply breakes or turn the car in a circle of radius r to avoid hitting the wall.

The driver of a truck travelling with a velocity upsilon suddenly notices a brick wall in front of him at a distance d It is better for him to apply brakes or to make a circular turn without applying brakes in order to just avoid crashing into the wall ? Why ?

The driver of a car travelling with velocity v on a road suddenly sees a broad wall in front of him at a distance r . He has two alternatives: to turn sharply or a brake instantly. The passenger who is a professor of physics, advises him to brake to avoid collision. Read the above passage and answer the following questions: (i) How is the suggestion from Professor of Physics justified? (ii)Does the suggestion work really? (iii)What value do you learn from this experience?

When the driver of a car A sees a car B moving towards his car and at distance 30m , takes a left turn fo 30^(@) . At the same instant the driver of the car b takes a turn to his right at an angle 60^(@) . The two cars collides after two second, then the velocity (in m//s) of the car A nad B respectively will be :[assume both cars to be moving along same line with constant spped]

Knowledge Check

  • The driver of a car-travelling at speed V suddenly sees a wall at a distance r directly infront of him. To avoid collision. He should :

    A
    apply the brakes
    B
    turn the car simply away from the wall
    C
    do any of the above options
    D
    none of these

  • The driver of a car travelling at velocity v suddenly see a broad wall in front of him at a distance d. He should

    A
    Brake sharply
    B
    Turn sharply
    C
    (a) and (b)
    D
    None of the above

  • A car moving on a horizontal road may be thrown out of the road in taking a turn.

    A
    By the gravitational force
    B
    Due to lack of sufficient centripetal force
    C
    Due to friction between road and the tyre
    D
    Due to reaction of earth